%%
%% The LaTeX Companion, 3ed
%%
%% Example 11-3-12 on page II-160 in "amscd --- Commutative diagrams a là AMS".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3examargin}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{147.0pt}

  % Shorten the vertical size of the example ...
  \AtBeginDocument{%
    \setlength\abovedisplayskip{.3\abovedisplayskip}%
    \setlength\belowdisplayskip{.3\belowdisplayskip}%
  }

%StartShownPreambleCommands
\usepackage{amsmath,amscd} \DeclareMathOperator{\End}{End}
%StopShownPreambleCommands

\begin{document}
\[ \begin{CD}
     S^{W_\Lambda}\otimes T @>j>>      T       \\
      @VVV                        @VV{\End P}V \\
    (S \otimes T)/I         @=   (Z\otimes T)/J
   \end{CD} \]
\end{document}
